It might be good for everybody: "For better or worse," walkaways are so common that the "stigma associated with foreclosure is fading," says Melinda Fulmer in MSN.com. The payoff is undeniable -- strategic defaulters can rent similar homes for hundreds less than they were paying on their mortgage. And economists say this serves as "stealth stimulus," because these people spend the extra cash and boost the economy."Should you feel guilty if you walk away?"